function getPosition( pos ) {
    return 20 + pos * 120;
}
function getNumberBackgroundColor(number) {
    switch (number) {
        case 2:
            return "#eee4da";
            break;
        case 4:
            return "#ede0c8";
            break;
        case 8:
            return "#f2b179";
            break;
        case 16:
            return "#f59563";
            break;
        case 32:
            return "#f67c5f";
            break;
        case 64:
            return "#f65e3b";
            break;
        case 128:
            return "#edcf72";
            break;
        case 256:
            return "#edcc61";
            break;
        case 512:
            return "#9c0";
            break;
        case 1024:
            return "#33b5e5";
            break;
        case 2048:
            return "#09c";
            break;
        case 4096:
            return "#a6c";
            break;
        case 3192:
            return "#93c";
            break;
    }
    return "black";
}
function getNumberColor(number) {
    if ( number <= 4 )
        return "#776e65";
 
    return "white";
}
function nospace(board) {
    for ( var i = 0; i < 4; i++ )
        for ( var j = 0; j < 4; j++ )
            if ( board[i][j] == 0 )
                return false;
    return true;
}
function canMoveLeft(board) {
    for (var i = 0; i < 4; i++)
        for (var j = 1; j < 4; j++)
            if (board[i][j] != 0)
                if (board[i][j - 1] == 0 || board[i][j - 1] == board[i][j])
                    return true;
    return false;
}
function canMoveUp(board) {
    for (var j = 0; j < 4; j++)
        for (var i = 1; i < 4; i++)
            if (board[i][j] != 0)
                if (board[i - 1][j] == 0 || board[i - 1][j] == board[i][j])
                    return true;
    return false;
}
function canMoveRight(board) {
    for (var i = 0; i < 4; i++)
        for (var j = 0; j < 3; j++)
            if (board[i][j] != 0)
                if (board[i][j+1] == 0 || board[i][j+1] == board[i][j])
                    return true;
    return false;
}
function canMoveDown(board) {
    for (var j = 0; j < 4; j++)
        for (var i = 0; i < 3; i++)
            if (board[i][j] != 0)
                if (board[i + 1][j] == 0 || board[i + 1][j] == board[i][j])
                    return true;
    return false;
}
function noBlockHorizontal(row, col1, col2, board) {
    for (var i = col1 + 1; i < col2; i++)
        if (board[row][i] != 0)
            return false;
    return true;
}
function noBlockVertical(col, row1, row2, board) {
    for (var i = row1 + 1; i < row2; i++)
        if (board[i][col] != 0)
            return false;
    return true;
}
function nomove( board ){
    if( canMoveLeft( board ) ||
        canMoveRight( board ) ||
        canMoveUp( board ) ||
        canMoveDown( board ) )
        return false;
    return true;
}